Influence of heat‑treated Al-Si coating on the weldability and microstructural inhomogeneity for hot stamped steel resistance nut projection welds

Eun‑Joon Chun,Sung‑Sang Lim,Young‑Tae Kim,Ki‑Sung Nam,김영민,Young‑Whan Park,Siva Prasad Murugan,Yeong‑Do Park 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.1

Resistance nut projection weldability of Al–Si coated hot stamped steel (HSS) was investigated under the viewpoint of weldablecurrent range and joint strength (pull-out load). The microstructural inhomogeneities in the welds were also studied inorder to elucidate the factors affecting the joint strength of the welds. The weldability of the given Al–Si coated HSS wascompared with the weldability of an identical HSS without the Al–Si coating (Al–Si coating was polished out) and Zn coateddual phase steel. The weldable current range of Al–Si coated HSS was found to be narrower than that of the other materials. Furthermore, the average pull-out load within the weldable current range of the Al–Si coated HSS was the lowest among thethree materials. The reason for poor weld mechanical property of the Al–Si coated hot-stamped steel was attributed to themicrostructural inhomogeneities such as unmixed Al–Si coating layer at the edge of the nugget and the second phase Fe3(Al,Si) intermetallic compound. The formation of Fe3(Al, Si) phase was attributed to the solidification segregation of Al and Siduring the weld solidification and was confirmed with the numerical analysis of solidification segregation.

일 도시지역 사업장내 인터넷 중독과 직무스트레스에 관한 연구

김남석(Nam-Seok Kim),신상은(Sang-Eun Shin),이계성(Kye-Sung Lee),이명지(Myung-Ji Lee),장은영(Eun-Young Jang) 한국중독정신의학회 2007 중독정신의학 Vol.11 No.2

Objectives:This study examined the prevalence of internet addiction, job stress, and psychopathology among industrial workers in Incheon, Korea. Methods:The subjects were male industrial workers (n=139) in Incheon, Korea. A self-rating questionnaire, asking about demographic data and including Young’s Internet addiction Test (IAT), the short form of the Korean Occupational Stress Scale (KOSS-SF) for job stress, and the Symptom Checklist-90-Revision (SCL-90-R), was administered in August 2006. Results:In this study, 12 subjects (8.6%) were in the internet addiction group and 128 subjects (91.4%) were in the non-addiction group. On the KOSS-SF, the internet addiction group scored higher for job stress than the internet non-addiction group, although the difference was not statistically significant. On the job stress subscales, relation conflict and workplace culture were significantly higher in the internet addiction group. The internet addiction group had higher scores on all symptom scales of the SCL-90-R. Paranoia was the psychopathology mediating the relation conflict between job stress and internet addiction. Conclusion:On the job stress subscales, relation conflict and workplace culture scored significantly higher in the internet addiction group than in the internet non-addiction group. The internet addiction group showed more severe psychopathology. Using the mediational relation model, we confirmed that the psychopathology of the SCL-90-R mediating job stress and internet addiction was paranoia. For more details, a future study is needed.

조기발병형 파킨슨병환자와 정상인의 호흡 및 발성 특성 비교

전은애(Eun Ae Chun),손영호(Young Ho Shon),백승재(Seung Jae Baek),이필휴(Phil Hyu Lee),남정모(Chung Mo Nam),이지은(Ji Eun Lee),최예린(Yaelin Choi) 한국언어청각임상학회 2010 Communication Sciences and Disorders Vol.15 No.4

배경 및 목적: 파킨슨병은 호흡과 발성에 영향을 준다. 49세 이전에 발병하는 조기발병형 파킨슨병(young-onset parkinson’s disease: YOPD, 이하 YOPD)도 호흡과 발성에 문제가 있는지 보기 위해 정상군과 비교하여 살펴보고자 하였다. 또한 파킨슨병 환자의 음성에 관한 연구는 있었지만 YOPD 환자의 음성특성에 대한 호흡과 발성 기능에 대해서 연구된 선행연구는 찾아보기 어렵다. 방법: YOPD 환자군 6명과 빈도대응 시킨 정상군 6명을 대상으로 호흡기능 평가를 위하여 MicroQuarkⓇ를 이용하여 노력성 폐활량(forced vital capacity: FVC, 이하 FVC), 1초간 노력성 호기량(forced expiratory volume at one second: FEV1, 이하 FEV1)과 1초간 노력성 호기량의 노력성 폐활량에 대한 비(이하 FEV1/FVC)를, 음향학적인 평가를 위하여 Multi-Dimentional Voice Program(이하 MDVP)를 이용하여 주기간 주파수 변동률 (이하 jitter)과 주기간 진폭 변동률(이하 shimmer)을, 공기역학적인 평가를 위하여 Phonatory Aerodynamic System(이하 PAS)를 이용하여 평균호기류율(mean airflow rate: MFR, 이하 MFR)과 성문하압(subglottal pressure: Psub, 이하 Psub)을, MDVP를 이용하여 최대발성지속시간(maximum phonation time: MPT, 이하 MPT)을 측정하고 분석하였다. 이비인후과 전문의사가 후두 스트로보스코피(stroboscopy)를 통해 후두의 병리 유무를 평가하였다. 두 집단의 호흡기능, 발성기능의 차이는 맨-휘트니 U검정(Mann-Whitney U-test)을 실시했다. 결과: MPT는 YOPD 환자군에 비하여 정상군이 통계적으로 유의하게 길었고, jitter와 shimmer는 정상군에 비하여 YOPD 환자군이 통계적으로 유의하게 컸다. 그러나 두 군간의 FVC, FEV1, FEV1/FVC, MFR, Psub은 통계적으로 유의한 차이가 없었다. 논의 및 결론: 두 집단 간의 호흡기능에서 차이가 없고 YOPD의 MPT, jitter, shimmer가 정상범주를 벗어나 차이가 있다. 이들 변수들이 YOPD의 음성적 진단, 치료계획과 예후를 판단하는데 도움이 될 것이다. 따라서 본 연구는 ‘연령’이라는 혼란변수를 배제하고 파킨슨병의 음성 특성을 규명 하는데 의의가 있다고 할 수 있다. Background & Objectives: Parkinson’s disease affects respiration as well as phonation. Young-onset Parkinson’s disease (YOPD) can occur even before the age of 49 years. The present study selected YOPD patients in such a manner as to exclude the confounding variable of ‘age’ and thus examine the vocal characteristics of Parkinson’s disease solely. We aimed to compare the respiration function and phonation characteristics of these YOPD patients with a normal group. Methods: The present study’s subjects included a YOPD group comprised of 6 patients whose chronological ages were between 38 and 49 years and onset ages were prior to 49 years, and a normal group comprised of 6 subjects selected by frequency-matching. For testing respiration function, FVC, FEV1 and FEV1/FVC were measured using Cosmed’s MicroQuarkⓇ as a basic test for the ventilation function of the lung. For vocal sampling, the Multi-Dimensional Voice Program (MDVP) and the Advanced Model 5105 of KayPENTAX’s Computerized Speech Lab (CSL) Model 4400 were used to analyze maximum phonation time (MPT), jitter, and shimmer. Additionally, KayPENTAX’s Phonatory Aerodynamic System (PAS) 4500 was utilized to analyze mean air flow rate (MFR) and subglottal pressure (Psub). Otolaryngologists and neurologists participated in the research cooperatively, and the otolaryngologists assessed the presence of laryngeal disease directly through larynx stroboscopy in the all subject. Mann-Whitney’s U test was used to analyze the difference between the 2 groups’ respiration and phonation function. Results: The MPT was longer in the normal group than YOPD patient group, and both jitter and shimmer were larger in the YOPD patient group than the normal group; both of these differences were statistically significant. However, there was no statistically significant difference in FVC, FEV1, FEV1/FVC, MFR, and Psub. Discussion & Conclusion: The 2 groups’ respiration function did not differ, and YOPD patients’ MPT, jitter, and shimmer differed beyond the normal range. Thus, these variables will help in YOPD patients’ phonation diagnosis and therapeutic plans or prognosis. Although there have been studies on the phonation of Parkinson’s disease patients, limited advanced research can be found on the respiration and phonation function of YOPD patients’ vocal characteristics. The results of this study are meaningful and provide a better understanding of Parkinson’s disease because the subjects were selected such that confounding by age was avoided.

자기 효능의 개념 분석

서순림,이은남,박송자,양영희,이동숙,최은옥,구미옥,김인자,이인숙,김성재,박영임,이은옥 서울대학교 간호대학 간호과학연구소 1997 간호학 논문집 Vol.11 No.1

Today human needs for health promotion and maintenance are increasing. The nursing progression has a great responsibility for helping clients to practice good health behavior. self efficacy was found to be potent predictor in initiating and maintaining the health-related behavior. Therefore, the concept is important in nursig intervention for change of health behavior. The purpose of this paper was to analyze and clarify the meaning of the concept, self efficacy. This study used Walder & Avant's process of concept analysis. Critical attributes of self efficacy were : 1) positive perception of his won capability; 2) intrapersonal strength; 3) possibility of being learned; 4) individuality; 5) specificity; 6) generalizability. Antecedents of self efficacy consist of those facts that 1) new situation occurs; 2) individuals have needs to change the new situation; 3) there are some required actions in new situation. Consequences occurring as a result of self efficacy consist of those facts that 1) individual initiates the of failure; 5) cope with the situation; 6) controls the situation; 7) the level of self efficacy is enhanced; 8) the level of self-esteem is enhanced.

한국인 인슐린 비의존형 당뇨병 및 이차성 당뇨병 환자에서 글루코키나제 유전자 변이

남재현(Jae Hyun Nam),이현철(Hyun Chul Lee),김연의(Youn Euy Kim),권석호(Suk Ho Kwon),윤용석(Yong Suk Yoon),박석원(Suk Won Park),원영준(Young Jun Won),차봉수(Bong Su Cha),송영득(Young Duk Song),이은직(Eun Jig Lee),임승길(Sung Kil Lim) 대한내과학회 1998 대한내과학회지 Vol.54 No.6

N/A Objectives: Mutations in the glucokinase (GCK) gene are considered a possible cause of maturity-onset diabetes of the young. The purpose of this study was to evaluate the contribution of this gene to the development of non insulin dependent diabetes mellitus (NIDDM), gestational diabetes mellitus (GDM) and post-renal transplantation diabetes mellitus (PTDM). Method: Identification of GCK mutation was attempted on 39 NIDDM patients, 2 GDM patients and 58 selected renal allograft recipients with PTDM and 45 normal controls. The exons in the GCK gene were examined by polymerase chain reaction (PCR), followed by analysis of single-stranded DNA conformational polymorphism (SSCP). The abnormal bands were also confirmed by DNA sequencing analysis. The exons of affected family members were also investigated for mutations of the GCK gene. Results: Two of the 58 PTDM patients (3.4%) were found to have CKK mutations. One had the mutation on exon 5 and the other on intron 7. One control subject had the mutation on intmn 9. The mutation of exon 5 was identified as a substitution of CCT (proline) for CTT (leucine) at codon 164, which has not ever reported before. The family members of the PFDM patient with mutation of exon 5 were analyzed by PCR followed by SSCP, and two of them revealed the same mutation. The abnormal band on the SSCP analysis of exon 7 was identified as the insertion of base C/T at the 39th nucleotide in intron 7. Two family members of this patients also had same band on SSCP. The one mutation of 45 normal controls was CT located at the 8th nucleotide in intron 9, which was a common polymorphism. Conclusion: We found GCK mutations in subjects with PTDM and we speculate that these mutations may be one of the contributing cause of PTDM.

대동맥 협착증과 동반된 출혈성 위장관 동정맥 기형에서 Estrogen-Progesterone 치료 1예

김도연,김화정,김효정,남준식,박수영,박영미,신정은,주미순,황민규,정혜경,손혜영,이선영,이한주 大韓消化器內視鏡學會 1999 Clinical Endoscopy Vol.19 No.부록2

소아에서의 Garre 골수염

우세은,김영진,김현정,남순현 大韓小兒齒科學會 2011 大韓小兒齒科學會誌 Vol.38 No.4

Garre’s osteomyelitis is associated with bacterial infection and bone necrosis resulting from obstruction of blood supply. The most common cause for Garre’s osteomyelitis is odontogenic infection that originates from periodontal tissue or dental pulp. Subperiosteal abscess may also cause Garre’s osteomyelitis in the progress of the infection. Mandible is more often affected than maxilla, most commonly in the permanent first molar region of mandible. Clinically, it results in a hard swelling over the jaw, producing facial asymmetry. Meanwhile, radiograph shows a characteristic feature of irregular pulpal cavity, showing new periosteal proliferation located in successive layers to the condensed cortical bone on stimulated site. The treatment method for Garre’s osteomyelitis are removal of the infection source, root canal treatment, antibiotic medication, and incision and drainage. This report presents a case of Garre’s osteomyelitis under 15 years old. The patient was successfully treated by antibiotic medication accompanied with root canal treatment. Since the symptom of pediatric patients is less severe than adult, careful diagnosis with history taking and clinical examination is necessary. Furthermore long-term follow-up examination is needed to prevent recurrence even after the symptom disapears. Garre 골수염은 혈류 순환 및 영양 공급의 장애로 골이 괴사되거나, 세균 감염이 증가되면 발생한다. Garre 골수염은 치수 나 치주 감염에서 시작된 치성계 감염과 이의 진행에 따른 골막 하 농양이 주요 원인이 되며, 외상으로 인한 악골의 복합 골절 시 2차 감염, 국소적인 치은의 외상에 의해서도 발생할 수 있다. 상악에서보다 하악에서 많이 발생되며 호발 부위는 하악 제 1대구치이다. 임상증상으로 이환 부위의 하악골은 팽창되어 있으나 구강점막은 정상적 색조를 가지며 안면 불균형을 나타낸다. 방사선 사진 상 심한 우식증을 가진 치아의 치근단 병소를 관찰할 수 있으며, 자극을 받는 골조직 부위의 치밀골 증가로 골수강은 좁 아지거나 폐쇄되며 외양이 불규칙하게 나타난다. 치료 방법으로는 항생제의 투여, 원인치의 발치 또는 근관치료, 절개 및 배농술 등이 알려져 있다. 본 증례는 15세 이하의 소아환자에서 악골 골수염이 발생한 경우, 장기적인 항생제 투여나 항생제 투여 및 근관 치료를 병 용하여 성공적으로 치료된 증례이다. 소아 환자의 경우 성인에 비하여 증상이 경미하므로 주의 깊은 병력 청취와 임상 검사를 통한 진단이 요구되며, 증상이 사라진 경우에도 재발을 방지하기 위하여 장기간의 추적 검사가 요구된다.

그레이브스병에서 치료에 따른 폐동맥압의 변화

남택만,조한수,이진서,송영림,김두만,두영철,박철영,정인경,홍은경,이성진,오기원,김현규,유재명,최문기,유형준,박성우 대한내분비학회 2003 Endocrinology and metabolism Vol.18 No.5

연구배경: 갑상선기능항진증에 의한 갑상선중독증 환자들은 호흡곤란을 호소하며, 그 원인으로 호흡근의 근력 약화, 좌심실부전으로 인한 폐모세혈관의 울혈, 기도저항의 증가, 갑상선종으로 인한 기관의 압박, 호흡기능 이상 등이 거론되고 있다. 폐동맥고혈압이 동반된 그레이브스병 환자가 여러 증례가 보고되었으며, 폐동맥고혈압 환자에게서 갑상선 자가항체와 갑상선기능저하증의 빈도가 높음이 알려지면서 갑상선중독증이 동반된 그레이브스병 환자에게서 관찰되는 호흡곤란의 한 원인으로 폐동맥압 증가가 작용할 가능성이 제시되고 있다. 이에 저자 등은 그레이브스병 환자를 대상으로 폐동맥압을 측정하고 치료 전후의 폐동맥압의 변화를 전향적으로 연구하였다. 방법: 갑상선중독증이 동반된 그레이브스병 환자와 정상 갑상선기능을 나타낸 대조군을 대상으로 갑상선기능검사 및 갑상선 자가항체를 측정하고, 심초음파를 이용하여 치료 전후로 폐동맥압을 측정하여 폐동맥압과 갑상선기능 및 갑상선 자가항체와의 관계, 폐동맥압의 변화 등을 관찰하였다. 결과: 1. 연구대상은 대조군 10명 (남녀비 1:9, 관해 상태의 그레이브스병 3명, 갑상선종 3명, 정상인 4명), 그레이브스병 환자 26명 (남녀비 7:19)이었다. 2. 대조군과 치료 전 그레이브스병 환자의 폐동맥압은 각각 23.5±2.32 mmHg, 29.6±10.3 mmHg이었고, 치료 전의 폐동맥압과 혈청 갑상선자극호르몬 결합억제 면역글로불린 (TBII) 농도는 유의한 양의 상관관계를 보였다. 3. 26명의 그레이브스병 환자 중에서 10명 (38.5%)이 폐동맥고혈압 (기준: 폐동맥압 > 30 mmHg)으로 진단되었다. 4. 치료 전후로 폐동맥압을 측정한 13명은 폐동맥압이 치료 전 29.6±10.3 mmHg에서 치료 후 폐동맥압 22.2±6.48 mmHg로 의미있게 감소하였다. 결론: 갑상선중독증을 보이는 그레이브스병 환자의 약 40% 정도에서 폐동맥고혈압이 발견되어 폐동맥고 혈압은 그레이브스병에 흔하게 동반하는 질환으로 생각된다. 향후 그레이브스병 환자에서 관찰되는 폐동맥압의 증가와 관련한 병인, 발생기전 및 임상적 의의 등에 대한 연구가 필요할 것으로 생각된다. Background: Exertional symptoms, dyspnea and impaired effort tolerance are common in patients with Graves' disease. Proposed explanations include: high-output left heart failure, ineffective oxygen utilization and respiratory muscle weakness. In addition, pulmonary hypertension has also been reported in patients with Graves' disease. A high prevalence of hypothyroidism and positive thyroid autoantibody were also observed in patients with pulmonary arterial hypertension. Therefore, the pulmonary artery pressure in patients with Graves' disease was evaluated. Methods: Two-dimensional and Doppler echocardiographic examinations (Hewlett Packard Sonos 2500) were performed to determine the pulmonary artery (PA) pressure in 26 Graves' disease patients, both before and after treatment (23 patients with propylthiouracil and 3 with RAI), and in 10 euthyroid controls. The changes in the PA pressure after treatment were evaluated in 13 patients with Graves' disease, who became euthyroid after treatment. Results: The pulmonary artery pressure was increased in the untreated Graves' disease patients compared to the normal controls (23.5±2.32 vs. 29.6±10.3 mmHg). 38.5% of the Graves' disease patients (10/26) showed pulmonary arterial hypertension (PA>30 mmHg) and the serum TBII level was higher in the Graves' disease patients with pulmonary arterial hypertension than in those with normal PA pressure (P<0.05). In the Graves' patients who became euthyroid after treatment, the PA pressure was significantly decreased. Conclusion: 38.5% of the untreated Graves' disease patients showed pulmonary arterial hypertension, and the pulmonary artery pressure was significantly decreased in those who became euthyroid after treatment. The pathogenesis and clinical importance of pulmonary arterial hypertension in Graves' disease requires further studies (J Kor Soc Endocrinol 18:465∼472, 2003).

日本의 醫藥分業推進政策의 考察

南銀祐,朴永澤,西垣克 고신대학교 보건과학연구소 2000 보건과학연구소보 Vol.10 No.-

Korean government decided to implement the separation policy of prescribing from July in 2000. The separation policy of Prescribing and dispensing belongs to public policy, and it is agreed important policy that is necessary system for improvement of public health. However, in case of Korea, there is not made a sense of its necessary and implementing period to both of providers and consumers yet. In spite of that, Korean government has a plan to enforce the separation of prescribing and dispensing without the result of proper pilot project in July 2000. Therefore, this study looked over the process separation politic implementation of prescribing and dispensing in Japan which is similar with medical care system of Korea. Especially this study was emphasized about the pilot project and support policy of government to the separation of prescribing and dispensing, and evaluation to the operation of separative system of prescribing and dispensing. The consequence of this study will be referred for the separation politic implementation of prescribing and dispensing in Korea. As a result, the core of the separation policy of prescribing and dispensing of Japan was the achievement of the separation of prescribing and dispensing through gradually expansive project. The pilot project was practiced at the demonstration area. Through this consequence, there used the supplement method from the problem of separation prescribing and dispensing. The present practiced rate of separation of prescribing and dispensing is 30%, and there was evaluation system of separation of prescribing and dispensing in order to promote efficiency of separation of prescribing and dispensing. Department of Drug Administration in Ministry of Health and Welfare was in charge of the evaluation of separation of prescribing and dispensing and dispensing based unit on the Promotive Conference of Separation of Prescribing and Dispensing in each area. The expense for the evaluation of separation of prescribing and dispensing was from national budget.

조대술에 의한 하마종의 치료

강동균,황경문,김은정,김현정,김영진,남순현 大韓小兒齒科學會 2006 大韓小兒齒科學會誌 Vol.33 No.1

하마종은 구강저에 발생하는 점액 남종으로 주로 설하선과 관련된다. 즉, 하마종은 설하선 분비도관의 파열로 인하여 타액이 분비도관에서 빠져나와 주위의 연조직 내에 저류됨으로써 발생하는 가성 낭으로 정의 되며, 원인은 설하선 도관의 파열이나 폐색이다. 하마종의 임상소견은 청색의 투명한 종창이 구강저의 소대를 중심으로 편측으로 발생하며, 무통성이며, 촉진시 파동성을 나타낸다. 조직소견은 결합 조직 내 와동이 형성되지만, 낭 벽은 상피세포가 아닌 육아조직으로 구성되는 가성 낭을 관찰할 수 있다. 하마종의 첫 번째 치료법으로는 하마종의 내벽이 구강점막의 일부가 되도록 만들어 주는 조대술을 고려할 수 있다. 본 증례는 특징적인 하마종의 임상소견을 보이는 환아에게 gauze-packing등을 동반한 조대술을 이용하여 치료한 증례로써 양호한 치료결과를 보여 보고하고자 한다. Ranula is a mucocele which occurs at the mouth floor and mostly related to sublingual gland. In other words ranula is definded as a pseudocyst which occurs as the secretion duct of sublingual gland is destructed there as the saliva from the the secretion duct flows out and retention in the soft tissue. The cause of ranula is destruction or obstruction of the duct. The clinical findings of ranula is a painless, unilateral bluish transparent swelling around the frenum and shows fluctuation when palpated. Histological finding represent a formation of cavity inside the connective tissue. but a pseudo-cyst can be seen which the wall of the cyst is composed of granulation tissue rather than epithelial cells. The first treatment of ranula can be considered as marsupialization. which induces the inner wall of the Ranula to be a part of oral mucosa. This case report shows a treatment of marsupialization with gauze packing in a young patient representing a clinical finding of characteristic ranula.